Internet speed and quality tools:

Netflix created this test to allow you to check whether your ISP is throttling connections to Netflix or not. Compare the results to the speed you see on SpeedTest. If the Netflix speed test results are significantly slower, that’s evidence your ISP is throttling

Google also provides a “Google Video Quality” report which will show the quality of your connection to YouTube’s servers. If you have a fast Internet connection but a poor quality connection to YouTube’s servers, that’s evidence that your ISP may be throttling YouTube connections.